Pump intake



March 24, 1925.

1,530,715 G; R. DAVENPORT PUMP INTAKE Filed July 21, 1921 INVENTOR 65D. 75? WHY/71 057 BY MWMQ ATTORNEY Patented Mar. 24, 1925.

UNITED STATES PATENT OFFICE.

GEORGE R. ljAvENPORT, OF DETROIT, MICHIGATI, ASSIGNOB TO STUDEBAKER COR- PORATION, A CORPORATION .OF NEW JERSEY.

' PUMP INTAKE.

Application filed July 21, 1921. Serial No. 486,531.

To all whom it may concern:

Be it known that I, GEORGE R. DAVENPORT, a citizen of the United States of America, and resident of Detroit, in'the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Pump Intakes, of which the following is a specification.

This'invention relates to means for providing a constant low pumping level for the intake of lubricating oil pumps in internal combustion engines, and to provide an improved support for the screen of the same.

It has been the usual practice of this art to provide simply a covering or casing of fine wire screen to cover or surround the intake opening of the oil pump. This intake opening at the bottom 0 the intake passage is, therefore, the lowest point or level from.

which the oil may be pumped, providing the screen surroundin it is free from obstructions. This free om from obstruction is not alwa s the fact however, as in the natural wor ing of the engine at least part of the lubricating oil becomes thick and gummy and becomes the carrier of dirt and sediment deposited from the products of combustion. The screen is provided to keep these undesirable materials out of the pump passages, but in the natural functioning of the engine these undesirable materials collect on and build pip around the screen, gradually shutting 0 its effective straining surface. As these materials become deposited and build up on the screen, the lowest oil pumping level is correspondingly raised to the top of these deposits, and the oil level gauge can not then be relied upon to indicate the effective low oil level. It is thus seen that the low pumping level may vary in such a device as just described, creating an ever impending danger of scoring or burning out the various bearings supplied with oil from the oil pump due to stoppage of pumping at a level much higher than that anticipated in the original design.

My invention has for its object the establishin of a constant low oil pumping level where .y obstruction of the straining screen will not alfectthe level from which the oil may be pumped, and further to provide an improved support for thescreens to keep the same from collapsing under conditions of relatively highvacuum.

My invention consists of a screen surrounding the oil intake, suitably supported by a perforated form, and a bell, or cupshaped member having a skirt which covers and surrounds the screen and-extends downwardly to a point neanthe bottom of the oil sump in which the opening for the oil intake passage is located. By this construction it will e clearly seen that should the lower part of the screen become so clogged with grease and sediment as to prevent the passage of oil thru that part of it, the partial vacuum under the bell caused by the oil pump will then cause the oil to be drawn up under it and thru the unobstructed portion of the screen situated above the obstructed portion. Thus it will be understood that no matter how high the deposit of grease or sediment on the screen may be, so long as the oil is flowing, the effective low oil pum ing level is established at the lower edge o the bell in question.

I In the accompanying drawings:

Fig. 1 is a fragmentary sectional view thru an internal combustion engine base containing a device of the type described.

Fig. 2 is a horizontal sectional view of the device taken on the line AA of Fig. 1.

Referring to the numbered parts of the drawing, 1 represents the lower part 'of an engine base comprising the oil sump; 2 is an oil splash pan; 3 is the intake assage of a lubricating oil pump, exten ing down into the oil sump and enclosed by the side screen 4 and bottom screen 5. The bottom screen 5 is placed over a perforated support 6 which is spaced from the sum cap 7 by the spring legs 8, allowing 011 to flow thru the support to the screen. Gaskets 9 are provided between the sump cap 7 and the base 1, and between the base 1 and the anchor ring 10. A perforated support 11 for the side screen 4 fits over the bottom support 6 and bottom screen 5 and is surrounded by the side screen 4 as shown. Extending over and around said side support. and screen is a hell or cupshaped member 12, thru the top of which passes the intake passage 3. A flared sleeve 13 soldered or brazed to the intake passage 3 acts as a locating stop for the bell 12 which is pressed up against the sleeve 13 by means of the spring legs 8. formin an air tight connection between the bell an passage. The screens 4 and 5,

h Supports and g 8, and

the bell 12 form a rigid assembly, held in position by the flared sleeve 13 on the intake passa e 3, and the spring legs 8. This assembly is removable for repairing or cleaning by taking off the sump cap 7, whereupon the assembly may be taken out as a umt thru the opening closed by the sump ca ormal changes may be made in the specific embodiment of the invention described without departing from the spirit or substance of the broad invention, the scope of which is commensurate with the appended claims. A

What I claim is l. The combination with an internal combustion engine, of a lubricating oil reservoir or sump therefor; a lubricating oil pump in-- take openin situated therein; a screen surrounding said intake opening; and a hell or cover tightly fitting around the lubricating oil intake passage or pipe and extending over and around said intake opening and said screen to a point near the bottom of said reservoir or sump.

2. The combination with an internal combustion en ine, of a lubricating oil reservoir or sump therefor; a lubricating oil intake passage or pi e; a lubricating oil intake opening in sai passage or pipe near the bottom of said reservoir or sump; a screen surrounding said intake opening suitably supported from within to prevent collapsing 'under a partial vacuum and suitably supported from the bottom'of said reservoir or sump; a bell or cover tightly fitting around said intake passage or pipe and extending over and around said intake opening and screen down to a point nearthe bot-tom of said reservoir or sump, all substantially as. described.

3. In a pump sump, the combination of an intake passage, an intake opening in said passage adjacent the lowest point of said sump, a screen spaced from said sump surrounding said intake opening, and a cupshaped member within said sump having an air-tight connection with said intake passage and enveloping said intake opening and screen and extending as low as or lower than said intake opening;

4. In combination, an intake passage, a frame work surrounding said intake passage, a screen covering and surrounding said frame work, acup shaped member within said sump havin an air tight, connection around said inta e passage and extending downwardly at least the distance of the intake opening, said frame work, screen and cup shape member forming an integral assembly, and means whereby said assembly may be removed from said sump as a unit.

5. The combination with an internal combustion engine, of an oil sumptherefor, a lubricating oil pump intake therein, a screen surrounding the said intake, a cup shape member within said sump surrounding said intake and said screen, and a common support for said screen and said cup shape memher.

6. The combination with an internal combustion engine, of an oil sump therefor, an oil pump intake therein, a screen surrounding said intake, a cup shape member surrounding said intake and said screen, and a perforated member forming a support for said screen and cup shape member and also providing inlet passages to said inlet.

7. In combination, an oil reservoir, an intake for an oil pump located therein, a flared sleeve on said intake, a cup shape member formin an air tight connection with said flared leeve, a screen surrounding said intake opening and a sup ort for said screen and said on shape mem er.

8. In com in'atlon, an oil reservoir, an intake for an oil pump located therein, a screen surrounding said intake, an inverted. cup shape member extending over and surrounding said screen, a support for said screen having openin s therein whereby when suction is applie in the intake, oil will be drawn through said screen and openings into said intake.

9. The combination with an internal com bustion engine, of an oil sump therefor, a lubricating oil pump intake therein, a screen surrounding sa1d intake, a cup shape member surrounding said intake and said screen, and means when suction is created in said intake for allowin oil to be drawn through substantially the ull area of said screen to said intake.

10. In combination, an oil reservoir, a cylindrical screen, means for exposing sa1d screen directly to the oil in sa1d reservoir .throughout its entire circumference over the lower portion of its length, means for kee ing the entire length of said screen su merged in oil as long as the oil level in said reservoir is above the upper end of the exposed portion, and a pocket in the bottom of said reservoir below said screen for storing accumulated sediment.

11. In combination, an oil reservoir, a cylindrical screen, means for exposing sa1d screen directly to the oil in sa1d reservoir throughout its entire circumference over the lower portion of its length, and means for keeping the entire length of said screen sub merge in oil as long as the oil level in said reservoir is above the upper end of the exposed p'ortion.

12. In an intake, acu shapedscreen open-- ing upwardly, a pocket elow said screen for storing sediment, and a cup-shaped shield opening downwardly and housing the upper portion of said screen.

13. In an intake, a cylindrical screen, and a cup-shaped shield over the upper end 0 said screen, said shield terminating above the lower end of said screen to expose the entire lower end of said screen directly to the liquid surrounding the intake, and sealing sald intake from air as long as the liquid level is above its lower end.

14. In an intake, a cup-shaped screen opening upwardly, and a cup-shaped shield opening downwardly, said shield closing the upper end of said screen and providing an annular space around the u per portion of said screen, said shield sea mg said intake against the admission of air as long as the liquid level remains above its lower end.

15. In combination, an oil reservoir, an inverted cup-shaped shield within said oil reservoir having its lower lip well below the normal oil level in said reservoir, a cupsha ed screen in said cup extendin below the evel of the edge of said cup, an means for withdrawing oil from inside said screen.

16. In combination, an oil reservoir, a cup-shaped screen opening upwardly, means for withdrawing oil from inside said screen, and a pocket in the bottom of said reservoir below said screen, said pocket having a removable bottom.

Signed by me at Detroit, Michigan, this 19th day of July, 1921.

GEORGE R. DAVENPORT. 

